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Consolidation analysis for partly saturated clay by using an elastic–plastic effective stress–strain model
Author(s) -
Chang C. S.,
Duncan J. M.
Publication year - 1983
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.1610070106
Subject(s) - consolidation (business) , geotechnical engineering , compressibility , void ratio , effective stress , critical state soil mechanics , permeability (electromagnetism) , pore water pressure , soil water , plasticity , geology , finite element method , materials science , constitutive equation , mechanics , thermodynamics , composite material , soil science , chemistry , physics , biochemistry , accounting , membrane , business
The theory of consolidation is extended to partly saturated clay soils, and formulated for finite element analyses. This formulation couples the effects of both stress and flow. It takes account of variations of this permeability of the soil and compressibility of the pore fluid with changes in void ratio, and the non‐linear stress–strain behaviour of soil. The Cam Clay model is revised to model the stress–strain behaviour of compacted soils. The compressibility of pore fluid is derived using Boyle's Law and Henry's Law, taking into account the effect of surface tension. An empirical equation is developed for permeability of pore fluid. An example of settlement of a footing on partly saturated soil is described and discussed.